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The ContentView doesn't have the lifecycle events. Did you use Xamarin.Community.Toolkit.TabView to display the views? To detect the lifecycle events, try using contentPages instead and using Shell
to for the template.
Here is a similar issue case that may help you.
https://learn.microsoft.com/en-us/answers/questions/170862/xamarin-bottom-custom-tab-bar.html
Best Regards,
Jarvan Zhang
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